Fig. 2: Sensor device and properties. | Microsystems & Nanoengineering

Fig. 2: Sensor device and properties.

From: Multiplexed DNA-functionalized graphene sensor with artificial intelligence-based discrimination performance for analyzing chemical vapor compositions

Fig. 2

a Schematic of the fabrication process of the graphene-DNA gas sensor array and conductive channel. b Optical and AFM images of the gas-sensing channel. c The height difference between AFM measurements before and after ssDNA adsorption was 1.61 nm. G peak (d) of Raman shift. e Top-view SEM images of graphene using functionalized thymine, adenine, and guanine sequences and cross-sectional-view SEM images (f) of graphene using functionalized thymine, adenine, and guanine sequences. g Mapping TOF-SIMS image of graphene using functionalized thymine, adenine, and guanine sequences, showing the magnitude spectral peaks at masses of 125 (thymine), 134 (adenine), and 150 m z−1 (guanine)

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